Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
tai cua » thai cua, tai cuc, tri cua
kham le » pham le
su kham » su pham, vu kham, so kham
hieu su » hieu sau, tieu su, hieu so
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cua tre » cua te, cuu tre, cua triet
ma hoi » xa hoi, me hoi, va hoi

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ty nang ((((ma hoi) OR (ma hoa))) OR (mai hoi)). hieu su kham le van hanh tai cua tre~.
• Adding a wildcard symbol may retrieve word variants: thuat sach ty nang ((((ma hoi) or (ma hoa))) or (mai hoi)). hieu su kham le van hanh tai cua tre*.